Roll buildtools/ and third_party/libc++/src/

buildtools_revision:
https://chromium.googlesource.com/chromium/src/buildtools.git/+log/f99b6dbc03f0..5e016b7d3282

Created with:
  roll-dep buildtools

libcxx_revision:
https://chromium.googlesource.com/external/github.com/llvm/llvm-project/libcxx.git/+log/13c08122f770..15db46be4ec5

Created with:
  roll-dep third_party/libc++/src

Change-Id: Iabd81be8d244db82a8f4dffd5e42a4e1d3b38a92
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/115130
Auto-Submit: Andy Phan <andyphan@chromium.org>
Commit-Queue: Andy Phan <andyphan@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
diff --git a/DEPS b/DEPS
index 33271d2..4036be3 100644
--- a/DEPS
+++ b/DEPS
@@ -76,7 +76,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling buildtools
   # and whatever else without interference from each other.
-  'buildtools_revision': 'f99b6dbc03f0c84b2b3d74f22329cd26a3c3aebc',
+  'buildtools_revision': '5e016b7d32822a0cbc3c65162aa9fc2bd021f275',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling catapult
   # and whatever else without interference from each other.
@@ -142,7 +142,7 @@
   # and whatever else without interference from each other.
   # If you change this, also update the libc++ revision in
   # //buildtools/deps_revisions.gni.
-  'libcxx_revision': '13c08122f7700c681d16a493071c6b69ee1d5a12',
+  'libcxx_revision': '15db46be4ec5e2c31a35bf07357b5025e2754693',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libc++abi
   # and whatever else without interference from each other.